Energy (signal processing)

Relationship to energy in physics

Energy in this context is not, strictly speaking, the same as the conventional notion of energy in physics and the other sciences. The two concepts are, however, closely related, and it is possible to convert from one to the other:

For example, if x(t) represents the potential (in volts) of an electrical signal propagating across a transmission line, then Z would represent the characteristic impedance (in ohms) of the transmission line. The units of measure for the signal energy would appear as volt2·seconds, which is not dimensionally correct for energy in the sense of the physical sciences. After dividing by Z, however, the dimensions of E would become volt2·seconds per ohm, which is equivalent to joules, the SI unit for energy as defined in the physical sciences.

Spectral energy density

Seven Year Itch (Collective Soul album)

On September 18, 2001, Collective Soul released their greatest hits compilation Seven Year Itch: Greatest Hits, 1994-2001 (stylized as 7even Year Itch). The compilation includes songs recorded from 1994 to 2001 and included two new tracks; "Next Homecoming" and "Energy". Seven Year Itch received decent reviews and was relatively successful It sold 225,000 copies in the first year after its release and reached number fifty on the Billboard 200; in Canada, it reached number nine on its albums chart and went platinum. All the songs in Seven Year Itch had charted in the US on the Billboard Hot 100, Mainstream Rock Tracks, or the Modern Rock Tracks chart, except for "Energy", which debuted in this compilation.

The compilation has sold over 500,000 copies. It saw a resurgence in sales after Collective Soul began putting out albums on their own independent label, El Music Group, beginning in 2004.

Seven Year Itch was the last album Collective Soul released through Atlantic Records and their last album to feature guitarist Ross Childress, who had been with the band since its 1993/1994 debut.

Collision

The Saudi Arabian Airlines (Saudia) Boeing 747-168B, registration HZ-AIH, was due to operate the first leg of a scheduled international Delhi–Dhahran–Jeddah passenger service as Flight 763 (SVA763) with 312 occupants on board; the Kazakhstan Airlines Ilyushin Il-76TD, registration UN-76435, was on a charter service from Chimkent to Delhi as KZA1907. SVA763 departed Delhi at 18:32 local time. KZA1907 was, at the same time, descending to land at Delhi. Both flights were controlled by approach controller VK Dutta. The crew of SVA763 consisted of Captain Khalid Al Shubaily, First Officer Nazir Khan, and Flight Engineer Edris. On KZA1907, Gennadi Cherepanov served as the pilot and Egor Repp served as the radio operator.

Saudi Aramco is the first energy company globally to be included in this select group of manufacturing sites ... "The recognition of the Uthmaniyah GasPlant demonstrates Saudi Aramco's shift to transform and adapt in the rapidly changing global energy landscape ... Saudi Aramco is a world-leading integrated energy and chemicals company....

The Saudis now plan to take Aramco public in 2021 according to EnergyMinister Khalid al-Falih ... A few days before, Saudienergy minister al-Falih said that Russia was moving with the cuts but “slower than I’d like, but they’ve started, and I am sure as they did in 2017, they’ll catch up and be a positive contributor to re-balancing the market.”....

IN a policy shift, the PTI-led government has decided to shepherd foreign firms into joint ventures ...Foreign firms are also accorded the same treatment as local capital ... SaudiArabia in oil refinery, petrochemicals, renewable energy and mining, with a memorandum of understanding for investment of over $10 billion expected to be signed this month ... ....

OPEC's crude oil production declined sharply in December primarily due to the drastic cut in SaudiArabia's output ... The much-needed support has been offered by Saudi Arabia leading the cuts ... SaudiEnergyMinister Khalid Al-Falih has assured markets that OPEC and allies will do whatever to rebalance the market....

SaudiArabia plans to build an oil refinery that would use Saudi crude, as well as a petrochemical plant in South Africa, as part of US$10 billion investments, SaudiEnergyMinister Khalid al-Falih said on Friday while on a visit to South Africa....

SaudiArabia demonstrated its resolve to lift oil prices by slashing output ahead of the entry into force of new pact limiting production while Russia boosted output to a record level, the InternationalEnergyAgency said Friday....

SaudiArabia plans to build an oil refinery and a petrochemicals plant in South Africa as part of $10 billion of investments in the country, SaudiEnergyMinister Khalid Al-Falih said on Friday ... "There have been exchanges of talks by Saudi Aramco teams and they have been supported by the South Africanenergy ministry," Al-Falih said....